Which of the following statements is CORRECT regarding studies of character
displacement?
Select one:
O a. Fenchel's (1975) early conclusions regarding character displacement
in mudsnails have been confirmed by subsequent studies.
O
b. Grant (1975) proposed a null hypothesis for character displacement
with his clinal variation model
O
c. Brown and Wilson (1956) provided clear, unambiguous data for
character displacement with their rock nuthatch data.
d. None of the above
O

phaneritic textures in which phaner means visible so phaneritic textures are standard of impertinent volcanic rocks. these rocks crystallized gradually under the surface of earth. when the magma cools deliberately then the ores have chance to develop and produce long crystals.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this